Open observing, tour of facilities, observation of galaxy, nebula, star cluster and planet, presented by John Young, Von Braun Astronomical Society Planetarium in Monte Sano State Park off Nolen Avenue, 6:30 p.m., $3, children 11 and under $2, members free, vbas.org or 539-0316.

National Public Lands Day, including cleanup of Flint River, 427-5116.